【摘要】 为了研究高速铁路路基的动力响应,这里模拟秦沈客运专线的路基条件,采用有限元分析方法,计算分析了铁路路基的动力响应(位移)在列车荷载作用下的分布规律,分析了影响路基位移值的各种因素,提出了路基动力响应(位移)随车速变化的"双峰现象"并分析其成因,最后将数值模拟结果与秦沈客运专线现场动力测试试验数据进行了对比,得出模拟和试验结果规律性一致的结论。更多还原

【Abstract】 Based on the railway subgrade of Qin-Shen special line for passenger transport,the dynamic response for quasi-high speed railway subgrade was simulated and studied.Using the finite element method,the railway subgrade’s dynamic response’s(dynamic displacement) distributed rule under the high speed train load was calculated and analyzed,the influencing factors of subgrade’s dynamic displacement were discussed,"the double peaks phenomena" which denoting the change of subgrade’s dynamic response(dynamic displacement) with railway speed was brought forward,and its causing reason was analyzed.The field testing dates of the qin-shen special line for passenger transport and the calculating dates were contrasted in the end,the conclusion was gotten that the numerical simulation and field test had accordant results.更多还原